need help...! dont know what to do. car still running. Please advise before car break down.

Hello Guys. Benefited a lot from d forum. You guys have help me save a lot of $s.....Drving the car for 6 years...great car.. However I've just received a free software upgrade offer from the dealer. Should I proceed..or stay put as my car is doing fine. My car is no more service by the dealer anymo...